Tuners are often confused when it comes to being able to identify whether a particular adjusting screw on a carb is a fuel screw (that adjusts low speed fuel delivery) or an air screw (that adjusts low speed air delivery). Carb accessory guru Lonn Peterson at Thunder Products tells... Read more

Arctic Cat has provided us with a step-by-step procedure on cleaning the APV exhaust valves. These valves can become sticky and carbon up after many miles and hours of operation. Factors like type of oil used, operation conditions and driving habits can affect how often the valves need to... Read more

Fox has provided some Q & A to common service questions they get regarding their innovative FLOAT Airshox. Now that these lightweight shocks are being offered on more and more sleds right from the factory, we thought it would be helpful to share this tech information about the shocks... Read more

With the introduction last year of the very open running boards on Summit Liquid-cooled models that were designed to reduce snow and ice build-up in deep powder, some very aggressive or heavier riders found the running boards could possibly sag or bend while riding in extremely rough conditions. Ski-Doo... Read more

Do you turn the remote adjuster dial on your 2005 Yamaha RX-1 with the MonoShock RA rear suspension but sense no change in suspension compliance? The cable could be broken! The remote cable adjuster and protective rubber boot found on the 2005 Yamaha MonoShock RA rear suspension can become... Read more

There have been a few reports of 2004 Ski-Doo models fitted with the 600 H.O. SDI engine package experiencing fuel starvation under hard acceleration. Some of these instances have been caused by the fuel pickup at the rear of the tank being installed backwards or too high in the... Read more

Some of the 2005 Yamaha RS models (those fitted with the three-cylinder 4-stroke 1000) may falsely activate the Throttle Override System (TORS) and indicate an â€œ84â€ error code in the tripmeter/odometer display (along with the warning indicator and engine icon). We experienced this on our 2005 RS Vector, and... Read more

Arctic Cat has alerted their dealer network regarding all 2005 M-series sleds. It has been determined that there are two conditions that need to be addressed on the 2005 M-Series snowmobiles. As you may already know, there is a possibility of moisture having entered the gear case. If this... Read more

2-stroke engine tuners know that observing the amount of piston wash on the piston dome is a very accurate indicator as to the best fuel-air mixture for maximum power production in competitive situations. These small â€œclean areasâ€ on top of the pistons, located where the fuel enters the combustion... Read more

The 2005 Mach Z was delivered with the TRA clickers set at #6, and this allowed the mighty twin to over-rev. Most riders simply turned the clickers down to #1 or #2, and while this tamed the peak operating RPM it tended to cause too much mass being thrown... Read more